Common constructs for the python programming language

python-constructs.py

# Resources
resources = Blueprint("api", __name__, url_prefix="/api")

def example_interactions():
    return ExampleInteractions(**flask.current_app.repositories)

@resources.route("/list/", methods=["GET"])
def example_db_list_endpoint():
    return jsonify(example_interactions().list())

@resources.route("/store/", methods=["POST"])
def example_db_store_endpoint():
    return example_interactions().store(flask.request.json)

# Interactions
class ExampleInteractions:
  def __init__(self, **repositories):
    self._database_repository = repositories["database_repository"]

  def list(self):
    return [m.to_dict() for m in self._database_repository.list_models()]

  def store(self, data):
    model = Model(input=data["input"], output=data["output"])
    return self._database_repository.store_model(model).to_dict()

# Repositories
class ExampleDatabaseRepository:
  def __init__(self, session):
    self._session = session

  def list_models(self):
    return self._session.query(Model)

  def store_model(self, model):
    self._session.add(model)
    self._session.commit()

    return model